EP0092175A2 - Dispositif électro-optique - Google Patents

Dispositif électro-optique Download PDF

Info

Publication number
EP0092175A2
EP0092175A2 EP83103611A EP83103611A EP0092175A2 EP 0092175 A2 EP0092175 A2 EP 0092175A2 EP 83103611 A EP83103611 A EP 83103611A EP 83103611 A EP83103611 A EP 83103611A EP 0092175 A2 EP0092175 A2 EP 0092175A2
Authority
EP
European Patent Office
Prior art keywords
substrate
light
cross
optical
electro
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP83103611A
Other languages
German (de)
English (en)
Other versions
EP0092175A3 (fr
Inventor
Peter Prohaska
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alcatel Lucent Deutschland AG
Alcatel Lucent NV
Original Assignee
Alcatel SEL AG
Standard Elektrik Lorenz AG
Alcatel NV
International Standard Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alcatel SEL AG, Standard Elektrik Lorenz AG, Alcatel NV, International Standard Electric Corp filed Critical Alcatel SEL AG
Publication of EP0092175A2 publication Critical patent/EP0092175A2/fr
Publication of EP0092175A3 publication Critical patent/EP0092175A3/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/03—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on ceramics or electro-optical crystals, e.g. exhibiting Pockels effect or Kerr effect
    • G02F1/055—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on ceramics or electro-optical crystals, e.g. exhibiting Pockels effect or Kerr effect the active material being a ceramic
    • G02F1/0556—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on ceramics or electro-optical crystals, e.g. exhibiting Pockels effect or Kerr effect the active material being a ceramic specially adapted for a particular application
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/024—Details of scanning heads ; Means for illuminating the original
    • H04N1/032—Details of scanning heads ; Means for illuminating the original for picture information reproduction
    • H04N1/036—Details of scanning heads ; Means for illuminating the original for picture information reproduction for optical reproduction

Definitions

  • the present invention relates to an electro-optical device for a facsimile writing device, facsimile machine, etc., in particular for line-by-line output of image information with an electrically controllable electro-optical substrate made of translucent electro-optical material, the optical effect by applying a voltage between two adjacent to the substrate arranged control electrodes is controlled.
  • the present invention is therefore concerned with the problem of being able to make these adjustments very precisely using simple means.
  • the substrate is arranged adjustable in a frame-like housing perpendicular to the longitudinal extent.
  • the electro-optical light line can be aligned exactly parallel to and above or behind a predetermined line.
  • the invention has solutions to the ability to adjust the other required optical systems. These solutions can also be used regardless of the possibility of adjusting the substrate.
  • the solution features result from the subclaims and the description.
  • Fig. 1, 1 denotes a substrate made of electro-optical material, which has the property that when a voltage is applied between two control electrodes 2 and 3 which are adjacent to one another in a spacing, the optical properties are changed in the region 4 present therebetween.
  • a well-known material for this is translucent lead-lanthanum-zirconate-titanate, which is known to have birefringent properties.
  • a multiplicity of regions 4 are provided in two partial lines 5 and 6, which, when projected onto one line, result in a continuous line.
  • the division into two sub-lines 5, 6 enables a very fine subdivision of a line into very narrow light spots (areas 4), which nevertheless can be easily contacted individually without the electrode width of the control electrodes 2 having to be made very thin. This provides a high level of security against a voltage flashover from one control electrode 2 to the neighboring one and a high current loading capacity.
  • the second control electrode 3 is designed as a strip-shaped center electrode and is therefore common to all regions 4.
  • an additional electrode 7 is provided for each area 4 on the side of the substrate 1 opposite the control electrodes 2, 3, which in the exemplary embodiment is designed as a surface electrode common to all areas 4 with window-shaped recesses 8 correspondingly shaped to areas 4.
  • a polarization filter 10 is provided after a light source 9, followed by the electro-optical device consisting of the substrate 1, the control electrodes 2, 3 and the additional electrode 7.
  • the additional electrode 7 is provided with an invisible recess 8.
  • a second polarizing filter 11 is attached, which is 90 ° out of phase with the first, so that no light is transmitted under normal exposure.
  • a radiation, in particular light-sensitive element 12 in an electrostatic printer for example a support with a Selenium, cadmium or silicon layer, which may still be doped accordingly, is provided.
  • the transmittance at a specific light intensity can be seen in the diagram of FIG. 5 at a voltage of zero V at the additional electrode 7. If a voltage is now applied to the additional electrode 7, the light transmission changes according to the curves indicated. As can be seen, these measures according to the invention can therefore be carried out on the recipient, i.e. existing light intensity on the photosensitive element 12 can be changed in a simple manner within a relatively wide range without the control voltage at the control electrodes 2, 3 having to be changed. It is therefore possible with the same intensity, e.g. reduce the control voltage from 200 to 170 V if a DC voltage of +50 to +100 V is applied to the additional electrode 7.
  • the mode of operation of the offset regions 4 of a light line divided into two partial lines 5, 6 will be briefly described with reference to FIG. 6.
  • the section of a carrier drum 13 with a radiation-sensitive layer 14 is provided here as the light-sensitive element 12.
  • the drum 13 rotates in the direction of the arrow 15.
  • the individual areas 4 of the part line 6 are first activated by briefly applying a control voltage to the lower control electrode 2 and the common control electrode 3, so that the layer 14 on the carrier drum 13 exposed in a partial line 6 'and, for example is discharged.
  • the sub-line 5 is activated by briefly applying a control voltage to the upper control electrode 2 and the center electrode 3 when the exposed sub-line 6 'is in front of the areas 4 of the sub-line 5.
  • a partial line 5 ' is then written between the partial line 6'.
  • the two sub-lines 5, 6 and 5 ', 6' are therefore written in one line. Because there is no need for an electrical connection between the areas 4, these areas 4 of the sub-lines 5 ', 6' can be written directly to one another. So you get a very good resolution.
  • control electrodes 2 are expediently provided perpendicular to the central electrode 3.
  • the substrate 1 is expediently fastened on a transparent support 16, which is adjustably inserted in a suitable frame 17 (FIGS. 7 and 8).
  • a circuit board 19 with conductor tracks 20 is provided on both sides.
  • the ends of the conductor tracks 20 facing the longitudinal edges 18 are each connected to the opposite control electrode 2 by a thin connecting line 21, e.g. a gold wire.
  • the circuit board 19 can in turn be attached to a support 22, which is also attached to the frame 17.
  • Carrier 16 and carrier 22 can also form a common carrier.
  • the conductor tracks 20 expediently have different lengths. This is advantageously done in that a certain number, e.g. five successive conductor tracks 20, starting from a basic length, are gradually shorter.
  • Connection contacts 23, for example solder or plug contacts, can then be attached to the ends, which preferably protrude perpendicularly from the circuit board 19.
  • the arrangement of the device according to FIG. 7 is shown in cross-section in a frame 17 in FIG. 8.
  • the approximately 17 cm wide and 40 cm long frame 17 in one embodiment consists of two frame-like plates 24 and 25 or plates 24, 25 assembled to form a frame, of which the one shown on the right has a relatively large central opening 26 with a polarization filter 27 and the one shown on the left a smaller gap-like opening 28 with has a second polarization filter 29, which is 90 ° out of phase with the first.
  • the plates or plate parts 24, 25 are screwed together.
  • the substrate 1 is adjustable in the frame in the direction of the substrate plane. This is done here in that a longitudinal edge 18 of the substrate 1 or an existing carrier 16 is inserted in a longitudinal groove 30 of an adjusting bar 31 extending over the length of the frame 17.
  • the opposite longitudinal edge 18 is e.g. held in a claw 32 of a compression spring 33 designed as a leaf spring.
  • the adjustment takes place via an adjusting screw 34, of which there are at least two over the length of the substrate 1, which are then preferably arranged in the end region thereof and act on the adjusting bar 31. With this type of holding the substrate 1, no support 16 is required.
  • a substrate 1 cannot be produced for any length, on the other hand, however, for a printer e.g. to print a line of a DIN A 4 page, the light line must be at least 18 to 20 cm long, several substrates 1 are arranged side by side. Two compression springs 33 and two adjusting screws 34 and an adjusting bar 31 are then provided for each substrate 1.
  • adjustment strips 31 can be combined to form a common strip and this is provided with an incision in the region of the separating joint between two adjacent substrates 1, so that several easily movable, contiguous partial strips, the lengths of which are formed each corresponds approximately to that of a substrate 1.
  • the adjustment strips 31 advantageously consist of elastic material, for example a suitable plastic.
  • the frame 17 is attached here to a carrier 35.
  • a light cross-sectional converter 36 for a light beam incident on a radiation surface 38 of the light cross-sectional converter 36 focused by a light source 37.
  • the light cross-section converter 36 converts the circular light surface 38 into a light line 39.
  • the light cross-sectional wall is shown in more detail in FIGS. 10 and 11. It can be seen that the circular irradiation surface 38 is converted into a luminous line 39.
  • the light cross-sectional wall 36 can consist of a molded part made of translucent plastic. It advantageously consists of a suitably shaped glass fiber bundle. This has small transmission losses and can be exposed to higher temperatures than a plastic injection molded part.
  • the light cross-section converter 36 is accommodated in a housing 40. This can be adjusted and adjusted by means of suitable mechanical components in the direction of the polarization filter 27 and thus the substrate 1 and transversely to the line direction (arrows 41 and 42). As a result, it can be aligned exactly parallel to the substrate line or the substrate sub-lines 5, 6, and the light intensity to be transmitted can be varied by shifting in the direction of the arrow 41. A convenient arrangement for Change in position is described later with reference to FIG. 13.
  • At least one heat filter 43 is provided between the light source 37 and the irradiation surface 38.
  • filters 43 ' can be provided which only let through or let through the desired wavelength or a desired wavelength range to which, for example, the light-sensitive layer 14 of the carrier drum 13 reacts particularly favorably.
  • a self-focusing light guide device 44 is attached below the second polarization filter 29. This directs the light beams controlled by the regions 4 in parallel so that they impinge strongly on the layer 14 of the carrier drum 13 which is arranged at a short distance from the output surface 45 and provide a sharply delimited point.
  • the light guide device 44 is shown schematically in a perspective view. It essentially consists of a supporting frame 46 with light guide rods 47 arranged parallel to one another therein. The latter are arranged offset from one another in such a way that the input surfaces 45 'and the output surfaces 45 are attached in the same pattern as the regions 4 of the substrate 1.
  • the light guide rods 47 are expedient from a so-called gradient optical fiber. Mese has continuous doping or suitable heat treatment in a special atmosphere from the inside out decreasing refractive index. Of course, other light guide rods with a gradually changing refractive index are also suitable.
  • FIG. 13 A cross support suitable for adjusting the light cross-sectional converter 36 is shown in FIG. 13.
  • the light cross-section converter 36 is fastened with two cross supports of this type, which are arranged on the longitudinal ends of the housing 40.
  • the latter consists of an axis 48 with a fine thread 49 on which a knurled wheel 50 is adjustable.
  • the axis 48 is e.g. rigidly attached to the frame 17.
  • a guide block 51 is provided above the axis 48. This has a slot 52 in the width of the thickness of the knurled wheel 50 at the bottom.
  • a threaded bolt 55 is fitted in a guide groove 54, over which a helical compression spring 56 is pushed.
  • An adjustment block 57 can be plugged onto this by means of the opening 58 of its guide projection 59 and can be fixed in its position by means of an adjusting nut 60.
  • the housing 40 of the light cross-section converter 36 is fastened to the adjustment block 57.
  • the housing 40 can be adjusted in the direction of the arrow 42 and by turning the adjusting nut 60 in the direction of the arrow 41.
  • the two cross supports provided on the longitudinal ends of the housing 40, a precise parallel alignment of the light line 39 to the line or the partial lines 5, 6 of the substrate 1 can be achieved.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Ceramic Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optics & Photonics (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
  • Facsimile Heads (AREA)
  • Facsimile Scanning Arrangements (AREA)
EP83103611A 1982-04-20 1983-04-14 Dispositif électro-optique Withdrawn EP0092175A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3214583 1982-04-20
DE3214583A DE3214583C2 (de) 1982-04-20 1982-04-20 Elektrooptische Schreibeinrichtung

Publications (2)

Publication Number Publication Date
EP0092175A2 true EP0092175A2 (fr) 1983-10-26
EP0092175A3 EP0092175A3 (fr) 1987-01-14

Family

ID=6161397

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83103611A Withdrawn EP0092175A3 (fr) 1982-04-20 1983-04-14 Dispositif électro-optique

Country Status (5)

Country Link
US (1) US4505552A (fr)
EP (1) EP0092175A3 (fr)
JP (1) JPS5915360A (fr)
CA (1) CA1197606A (fr)
DE (1) DE3214583C2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0267813A1 (fr) * 1986-08-20 1988-05-18 Georgi, Marcel Phototraceur à rouleau multifaisceau

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3214519A1 (de) * 1982-04-20 1983-10-20 Olympia Werke Ag, 2940 Wilhelmshaven Drucker mit einem optischen druckknopf zum zeilenweisen aufzeichnen von bild- und textinformation
DE3411847A1 (de) * 1984-03-30 1985-10-10 Olympia Werke Ag, 2940 Wilhelmshaven Drucker mit einem optischen druckkopf zum zeilenweisen aufzeichnen von graphik- und textinformationen
US4722597A (en) * 1984-06-08 1988-02-02 Matsushita Electric Industrial Co., Ltd. Electrooptic shutter array element
JPS61293508A (ja) * 1985-06-24 1986-12-24 Nippon Jiyouriyuu Kogyo Kk 消泡剤組成物

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB255185A (en) * 1925-03-02 1926-07-22 Western Electric Co Transmission of pictures or the like by electricity
US3827062A (en) * 1972-12-18 1974-07-30 Xerox Corp Optical arrangement for high speed printout system
GB2049974A (en) * 1979-04-30 1980-12-31 Bell & Howell Co Methods and apparatus for recording electric signals
FR2463681A1 (fr) * 1979-08-21 1981-02-27 Oki Electric Ind Co Ltd Tete d'impression optique pour des imprimantes optiques
US4297713A (en) * 1978-06-03 1981-10-27 Canon Kabushiki Kaisha Laser recording apparatus
GB2118734A (en) * 1982-04-20 1983-11-02 Int Standard Electric Corp Electro-optical device

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3746840A (en) * 1970-07-02 1973-07-17 Westinghouse Electric Corp Resolution improvement for optical scanners
DE2301335C3 (de) * 1973-01-12 1978-12-07 Philips Patentverwaltung Gmbh, 2000 Hamburg Faksimile-Verfahren mit abwechselnder Verwendung einer Endstation als Empfänger oder Sender
DE2322473A1 (de) * 1973-05-04 1974-11-21 Philips Patentverwaltung Faksimile-geraet zum schreiben und lesen von mechanisch bewegten vorlagen
JPS5086932A (fr) * 1973-12-01 1975-07-12
JPS5412366B2 (fr) * 1974-10-30 1979-05-22
DE2557254A1 (de) * 1975-12-19 1977-06-30 Agfa Gevaert Ag Faksimile-schreibeinrichtung
US4177487A (en) * 1977-04-11 1979-12-04 Fuji Xerox Co., Ltd. Facsimile scanner
JPS54148417A (en) * 1978-05-15 1979-11-20 Ricoh Co Ltd Recording head
DE3018452C2 (de) * 1980-05-14 1983-11-10 Standard Elektrik Lorenz Ag, 7000 Stuttgart Faksimile-Schreibeinrichtung
JPS5763507A (en) * 1980-10-06 1982-04-17 Seiko Epson Corp Printer head driven by liquid crystal
US4410240A (en) * 1981-07-13 1983-10-18 Motorola, Inc. Mounting structure for electro-optic character elements

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB255185A (en) * 1925-03-02 1926-07-22 Western Electric Co Transmission of pictures or the like by electricity
US3827062A (en) * 1972-12-18 1974-07-30 Xerox Corp Optical arrangement for high speed printout system
US4297713A (en) * 1978-06-03 1981-10-27 Canon Kabushiki Kaisha Laser recording apparatus
GB2049974A (en) * 1979-04-30 1980-12-31 Bell & Howell Co Methods and apparatus for recording electric signals
FR2463681A1 (fr) * 1979-08-21 1981-02-27 Oki Electric Ind Co Ltd Tete d'impression optique pour des imprimantes optiques
GB2118734A (en) * 1982-04-20 1983-11-02 Int Standard Electric Corp Electro-optical device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0267813A1 (fr) * 1986-08-20 1988-05-18 Georgi, Marcel Phototraceur à rouleau multifaisceau

Also Published As

Publication number Publication date
JPS5915360A (ja) 1984-01-26
DE3214583C2 (de) 1984-08-30
US4505552A (en) 1985-03-19
DE3214583A1 (de) 1983-10-27
CA1197606A (fr) 1985-12-03
EP0092175A3 (fr) 1987-01-14

Similar Documents

Publication Publication Date Title
DE1447208B2 (de) Anordnung zur schnellen brennweitenverstellung
DE3300226A1 (de) Varioobjektiv
DE3345038A1 (de) Optische wellenleitervorrichtung
EP0075223A2 (fr) Dispositif de reconnaissance optique de données codées sur une bande de test diagnostique
EP0599375A1 (fr) Modulateur de lumière
EP0020918A1 (fr) Réflecteur pour différents angles d'éclairage
DE3600325A1 (de) Objektiv mit veraenderlicher brennweite
DE19611726A1 (de) Strichplatte zur Außer-Achsenbeleuchtung
DE3734849C2 (de) Elektrooptische Abblendeinrichtung
EP0092175A2 (fr) Dispositif électro-optique
DE3214584A1 (de) Elektrooptische vorrichtung
DE2720790C2 (de) Haltevorrichtung für optische Bauelemente in einem nach dem elektrophotographischen Prinzip arbeitenden Drucker
DE3617947A1 (de) Objektiv mit veraenderlicher brennweite
DE2227367A1 (de) Optische ablenkeinrichtung
EP0482047B1 (fr) Convertisseur de signaux lumineux en signaux video
DE2359797C3 (de) Schaltbare optische Wellenleitereinrichtung
DE2033965B2 (de) Digitale lichtablenkvorrichtung
DE3302332C2 (fr)
DE3903150C2 (fr)
DE3131227C2 (de) Elektrisch ansteuerbarer optischer Modulator
DE2421866B2 (de) Beleuchtungsvorrichtung für Mikroskope
DE1639277B2 (de) Elektrooptische modulationseinrichtung
EP0428501B1 (fr) Amplificateur d'images optiques
DE1917147C3 (de) Vorrichtung zum Modulieren eines Wiedergabelichtbündels entsprechend einem steuerenden, eine aufzunehmende Bildinformation tragenden optischen Strahlenbündel und Verwendung der Vorrichtung zur informationsspeicherung und -wiedergewinnung
DE1639277C3 (de) Elektrooptische Modulationseinrichtung

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): BE DE FR GB IT NL

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): BE DE FR GB IT NL

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: STANDARD ELEKTRIK LORENZ AKTIENGESELLSCHAFT

Owner name: ALCATEL N.V.

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19870715

RIN1 Information on inventor provided before grant (corrected)

Inventor name: PROHASKA, PETER